Blending jar having a vortex shifting means

ABSTRACT

A variety of embodiments of blending containers are shown herein. In one embodiment, the blending container includes a mixing blade that rotates on an axis adjacent to the bottom of the blending container. The blending container includes one or more walls that extend upward from the bottom and a handle secured to the one or more walls. The blending container may be configured so that a vortex created when liquid is blended inside the container is not positioned over the axis. The blending containers may also be configured to stack inside one another.

RELATED APPLICATIONS

This is a continuation of U.S. patent application Ser. No. 11/823,625,filed on 27 Jun. 2007, now pending, which is a continuation of U.S.patent application Ser. No. 11/318,830, filed 26 Dec. 2005, now U.S.Pat. No. 7,281,842, which is a continuation of U.S. patent applicationSer. No. 10/947,682, filed 23 Sep. 2004, now U.S. Pat. No. 6,979,117,which is a continuation of U.S. patent application Ser. No. 10/150,919,filed 17 May 2002, U.S. Pat. No. 6,811,303.

FIELD OF THE INVENTION

This invention relates to blending devices, and more particularly toblending devices capable of high-volume, rapid-succession production ofblended beverages.

BACKGROUND OF THE INVENTION

Food processors and blending devices have existed for many years. Oneexample of a blending device is shown and described in U.S. Pat. No.5,655,834, which is incorporated in its entirety by this reference.

Food processors and blending machines are being used now more than ever,particularly in the high-volume, commercial beverage industry. Peopleare increasingly becoming aware of the benefits, in terms of taste andquality, of well-processed beverages. Blended fruit smoothies andsimilar fruit drinks, popular with all types of people ranging from thefitness conscious to the less active, require a food processor orblending machine. Cold beverages, in particular, which utilize fruit(frozen or fresh) and ice to prepare present unique challenges inbeverage preparation. An appropriate blending machine will break downthe ice, fruit, and other ingredients in attempting to achieve an idealuniform drink consistency. In addition, food processors or blendingmachines are ideal for mixing nutritional supplements into beverageswhile similarly attempting to achieve an ideal uniform drinkconsistency.

In addition to the recent increase in the popularity of smoothies, foodprocessors and blending machines are being used to produce many new anddifferent beverages. For example, different types of coffees, shakes,dairy drinks, and the like are now commonly served at many differenttypes of retail business locations. Consumers are demanding morediversity and variety in the beverages available at these smoothie andother retail stores. The keys to producing a high quality beverage,irrespective of the specific type of beverage, are quality ingredientsand a high quality blending machine that will quickly and efficientlyblend the ingredients to produce a drink with uniform consistency.

One problem associated with businesses that depend on blending machinesis the speed with which the beverage or drink is prepared. In the foodpreparation industry, time equals money. Beverages have traditionallybeen made by retrieving the appropriate ingredients, placing theingredients inside a mixing container, and actuating a motor whichdrives a blade mounted inside the mixing container to blend the contentsheld within the mixing container. Virtually all traditional blendingdevices require some type of manual programming by tactile actuation(i.e., actuation by the operator's fingertips) of at least one switch,and commonly several switches (particularly where variable speeds aredesired), through a key pad or the like to initiate operation of theblending device. Such programming requires focused action by theoperator and, as a result, takes up time in the blending process. Eachsecond of time wasted, even a fraction of a second of time wasted, addsup over time to significant amounts of money lost for any commercialoperation.

Another problem with respect to prior blending devices relates tosafety. While the potential for the beverage ingredients to be hurledall over the place may provide some incentive to place a lid on themixing container before blending, any additional incentive to maintain alid on the mixing container during processing will enhance safety.

Still another traditional problem with respect to blending devicesrelates to cavitation, which occurs when a pocket of air envelops thearea surrounding the blade. Efforts are continually being made to designblending devices to reduce cavitation.

Yet another problem with respect to traditional blending devices relatesto the type of ingredients that need to be mixed to create an optimaldrink consistency, and the ability of the blending device to handle suchingredients. For example, individually quick frozen (IQF) fruit is nowcommonly used in making smoothies. Most blending devices are simply notcapable of appropriately handling IQF fruit to achieve an optimal,uniform consistency.

In view of the foregoing, there is a need to provide a blending stationapparatus and method of blending that will allow beverages to be madequickly and efficiently minimizing the overall time required betweenordering a beverage and serving the beverage to the customer. There isalso a need to provide a blending apparatus and blending method thatwill minimize the need to program the blending device just prior toactuating the device. There is still further a need to develop ablending device that reduces cavitation. Yet another need exists toprovide a blending device with a blade and jar configuration that willproduce a beverage with an optimal, uniform consistency with respect toall desired ingredients.

SUMMARY OF THE INVENTION

The present invention relates to a blending apparatus which includes anarticulable housing that pivots relative to a surface, which may be astationary base or the surface supporting the blending apparatus, toactuate at least one switch to initiate a blending cycle. As the switchis actuated, by downward pressure exerted on one side of the blendingdevice, the blade mounted inside the mixing container rotates at a firstspeed. As the articulable housing is rotated further toward thestationary surface, one or more an additional switches may be actuatedto causes the blade mounted within the mixing container to rotate atsequentially higher speeds. After the appropriate mixing, and theoperator of the blending device releases the downward pressure on thehousing, a bias member, such as a coil spring, urges the housing upwardaway from engagement with the switches to cut off power supplied to themotor and stop blade rotation.

Another aspect of the present invention relates to the internal shape ofthe mixing container. The mixing container geometry shifts the center ofthe fluid-flow vortex off-center relative to the rotational axis of theblade. This reduces cavitation which commonly occurs where thefluid-flow vortex is concentric with the axis of rotation of theblending blade.

Still another aspect of the present invention relates to the relativesize of the mixing blade and its orientation relative to the sidewallsof the mixing container. The combined geometry of the mixing containerin combination with the blade allows all types of ingredients, includingIQF fruit, to be blended in the blending device to produce a drink witha desired, uniform consistency.

The foregoing and other features, utilities and advantages of theinvention will become apparent from the following detailed descriptionof the invention with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a side elevation view of a blending apparatus according to thepresent invention;

FIG. 2 is a perspective view of the articulable housing utilized inconnection with the blending device of FIG. 1;

FIG. 3 is a perspective view of the underside of the housing of FIG. 2;

FIG. 4 is a perspective view of the stationary base of the blendingdevice of FIG. 1;

FIG. 5 is a perspective view of the underside of the stationary base ofthe blending device of FIG. 1;

FIG. 6 is a perspective view of the top side of the switch plateutilized in connection with the blending device of FIG. 1;

FIG. 7 is a perspective view of the underside of the switch plateutilized in connection with the blending device of FIG. 1;

FIG. 8 is a perspective view of the switch plate with a motor securedinside the motor receiving area of the switch plate;

FIG. 9 is a partial perspective view of the blending apparatus of FIG. 1showing the stationary base removed and showing the switch plate securedinside the housing of FIG. 2 and holding the motor in operative positionwithin the housing of the blending device;

FIG. 10 is a perspective view of the mixing jar utilized in connectionwith the blending apparatus shown in FIG. 1;

FIG. 11 is a top view of the mixing jar of FIG. 10;

FIG. 12 is an enlarged, partial sectional side elevation view of theblade assembly mounted within the mixing jar as shown in FIG. 10;

FIG. 13 is a side elevation view of the jar showing how an additionaljar can be stacked on top;

FIG. 14 is a perspective view of the top side of the lid utilized inconnection with the mixing jar of FIG. 10; and

FIG. 15 is a perspective view of the bottom side of the lid utilized inconnection with the mixing jar shown in FIG. 10.

DETAILED DESCRIPTION OF THE INVENTION

The present invention relates to a blending apparatus 20 which, in oneembodiment, the blending apparatus 20 is a stand-alone, portableblending device.

The blending device 20 comprises a stationary base 22 and a motorhousing or cover 24 which articulates relative to stationary base 22 toactuate one or more switches which cause the blender to operate. Thedescription of the manner in which one or more switches are actuated isset forth below. The blending device 20 further comprises a mixingcontainer or jar 26 in which a mixing blade 28 is rotatably mounted. Theblending device still further comprises a lid 30 which covers the openend of the jar 26 during operation.

The housing or cover 24, as shown in FIG. 2-3, comprises a shell-likecover structure 32 which serves to hold and protect the motor whichdrives the blending device 20. Any suitable motor know to those skilledin the art may be utilized without departing from the spirit and scopeof the present invention. The housing 24 further defines a mounting base34 for the jar which comprises four upstanding guide extensions 36 whichserve to guide and hold the jar 26 in place in operative position on thehousing. A central aperture 38 is formed in the articulable housing 24which receives a splined receptacle coupled to the motor. The splinedmotor receptacle receives, in turn, the splined shaft coupled to themixing blade (described below).

A plurality of archways 40 are formed in the bottom of housing 24. Thearchways 40 allow an appropriate amount of air circulation underneaththe blending apparatus 20 and about the motor (described below).

With reference to FIG. 3, a plurality of relatively short motor guidesor flanges 42 and a pair of relatively long motor guides or flanges 44extend downwardly and integrally from the shell wall 32 of the housing24. The guides 42, 44 require that an appropriately sized motor bemounted within the housing in an appropriate orientation so that thesplined receptacle for the shaft of the blender blade 28 will beconcentrically mounted within aperture 38.

A plurality of integral, first locking retainers 46 (FIG. 3) extendinwardly from the shell 32 to retain the switch plate 50 (FIGS. 6-8)within the housing 24. A plurality of integral, second locking retainers48 also extend inwardly from the shell wall 32 to retain the stationarybase 22 as part of the overall unit which comprises the blendingapparatus 20. A plurality of first shelf members 52 (only two setsshown) extend inwardly and integrally from shell wall 32 to support theswitch plate 50, and a plurality of second shelf members 54 (only setshown) extend inwardly and integrally from shell wall 32 to providesupport for the base portion 22 of the blending apparatus 20.

FIGS. 4 and 5 show the stationary base 22 utilized in connection withthe present invention. The base includes four foot locations 56 whichdefine circular wells or pockets into which rubber feet 58 (FIG. 5) aremounted. The rubber feet 58 provide enhanced friction for the surface onwhich the blending apparatus 20 rests. Still further, the rubber feet 58are resilient and provide a shock-absorbing and quieting benefit to theblending apparatus 20.

The base 22 defines a central well or concave area 60 which provides aspace to allow for articulation of the combined switch plate 50/motor 80(described below) into the well 60. The base 22 further includes anaperture 62 for receiving a power cord 61 (FIG. 9) which supplies powerto the motor. The base further defines three vent areas 64, 66, 68 whichallow a sufficient amount of air to flow inside of the cover 24 andaround the motor for efficient and effective cooling of the motor. Aplurality of archways 70 are formed in each side of the base and areintended to be aligned with archways 40 (FIGS. 1-3) formed in thehousing 24 to allow an appropriate flow of air underneath the blendingapparatus 20 and around the motor 80.

A plurality of rigid, integral posts 72, 74, 76 extend upwardly frombase 22. The posts 72, 74, 76 are oriented opposite switches secured tothe articulable housing 24. As described below, the relatively tall post72 engages a first switch upon articulation of the housing 24 and switchplate 50 relative to the base 22. As the housing 24 and switch plate 50are further articulated relative to base 22, relatively shorter posts74, 76 engage other switches to increase the operational speed of theblending apparatus. To ensure that the base 22 fits snugly andappropriately inside of the bottom of housing 24, a plurality of tabs 78(only one pair are shown) extend outwardly from the main portion of base22.

While the embodiment of FIGS. 1-9 shows a plurality of switches utilizedin connection with the blending device 20, it is to be understood that asingle switch may be utilized. Any suitable type of switch known tothose skilled in the art may be utilized in connection with the blendingdevice without departing from the spirit and scope of the presentinvention. For example, an infinitely variable speed switch, whichincreases the rotational speed of the blending blade in proportion tothe distance by which the switch is depressed, may be utilized inconnection with the present invention. Still further, a type of variableresistance cushioned foot may be utilized so that the degree ofdeformation of the deformable foot can be measured and the rotationalspeed of the blade changed in proportion to the degree of deformation ofthe foot. These are simply examples of switches that may be utilized.Those skilled in the art will understand the various types of switchesthat may be utilized in connection with the present invention.

FIGS. 6-8 show the switch plate 50 which secures the motor 60 (FIG. 8)inside the articulable housing 24. The switch plate 50 includesgenerally a motor retaining area 81 which includes a central aperture 82for concentrically mounting a bearing associated with the shaft of motor80. Guide walls 83, 84, 85, 86 provide a relatively tight fit for motor80 such that the motor can be properly aligned with respect to theswitch plate 50. Grooves 87 allow lead wires for the motor to extendthrough guide walls 83, 85. Passageways 88, 90 provide mountinglocations for brushes for the motor. Open areas 89, 91, 93 (FIGS. 6-9)allow air to circulate about motor 80 (FIGS. 8 and 9).

After the motor 80 has been positioned in its appropriate locationinside motor receiving area 81, the entire assembly is urged upwardlyinto the articulable housing 24 (FIGS. 2 and 3) until the transversewall 88 of the switch plate 50 snaps into place and is held in theappropriate position by retaining tabs 46 (FIG. 3). When appropriatelyinstalled, the drive spline 92 (FIG. 8) and associated bearing 94 fitsnugly inside of mounting aperture 38 (FIG. 3) in the articulablehousing 24. FIG. 9 shows the motor 80 and switch plate 50 secured insideof housing 24.

The switch plate 50 further defines a plurality of apertures 96, 98, 100(FIGS. 6-8) which receive a plurality of switches 102, 104, 106 (FIG.9). The appropriate lead wires 108, 110, 112 are coupled to switches102, 104, 106, respectively, and provide power to the motor 80. Uponsecuring the switch plate 50 and appropriately secured switches 102,104, 106 inside of housing 24, the switches 102, 104, 106 are positionedfor appropriate engagement with posts 72, 74, 76 (FIG. 4) uponarticulation of the housing 24 relative to the base 22.

To bias the base 22 away from switch plate 50, bias members in the formof a pair of coil springs 114, 116 are disposed inside of appropriatelysized pockets 118, 120 (FIGS. 7 and 9). Springs 114, 116 are held in acompressed, biasing condition upon installation of base 22 withinhousing 24. Springs 114, 116 engage the top surface 63 of base 22 (FIG.4).

As shown in FIG. 1, the initial, undisturbed orientation and inclinationof housing 24 relative to base 22 creates as differential space 25toward the back side of the blending device. Space 25 allows forarticulation of the cover or housing 24 relative to stationary base 22.In one embodiment, articulation of the housing 24 approximately 1/16 ofan inch relative to the base 22, the tall post 72 (FIG. 4) engagesswitch 102 (FIG. 9) to actuate the motor and rotate the blade 28 at afirst rotational speed. At this first or low speed, the blade 28 willrotate between a range of approximately 8,000 rpm to 14,000 rpm (in ano-load condition). Upon further articulation of the housing 24 relativeto base 22 an additional 1/16 of an inch, the short posts 74, 76 willengage switches 104, 106 to increase the rotational speed of the blade28 to between a range of approximately 16,000 rpm to 32,000 rpm (in ano-load condition). Therefore, in one embodiment, the total movement ofthe articulable housing 24 relative to the stationary base 22 will beapproximately ⅛ of an inch. It is to be understood, however, that anyreasonable range of articulation of the housing relative to the base (orrelative to any stationary surface on which the blending device rests)may be utilized in connection with the present invention.

A benefit relative to the present invention is that the switches 102,104, 106 serve as the actuation switches for the blending device 20.That is, the articulable housing which actuates switches 102, 104, 106eliminates the need for a power switch. Switches 102, 104, 106 are, infact, the power switches. Upon return of the housing 24 to its normalposition relative to stationary base 22 (which occurs absent anyexternal force on the lid 30/jar 26 combination), power supplied to themotor 80 (FIGS. 8 and 9) is cut off.

Another benefit of the blending apparatus with an articulable actuationmode include the speed with which beverages can be made. There are nomanual buttons or switches that need to be actuated by the fingers ofthe operator. Rather, as soon as the appropriate ingredients areintroduced into the jar 26 (as understood by those skilled in the art),the jar, in combination with the affixed lid 30, is positioned over theupstanding guide extensions on base 24 (FIG. 2). Thereafter, arelatively small amount of downward pressure applied to the top of lid30 will cause housing 24 to articulate relative to base 22 and actuateone or more of the switches to blend the beverage at the desired speed.This method of making a beverage is faster and more efficient ascompared to traditional blending devices that require programming bytactile manipulation. Over the course of days, weeks, and months, thepresent invention allows many more beverages to be produced to satisfythe demands of customers.

Another unique aspect of the present invention relates to the jar 26.The jar 26 is sized to hold approximately 3 quarts. As shown in FIGS.10-13, the jar 26 includes an open end 130 into which ingredients forthe beverage may be inserted. The opening 130 is defined by four walls132 (first wall), 134 (second wall), 136 (third wall), 138 (fourth wall)and has a generally rectangular shape. Walls 132,136 face each other andwalls 134,138 face each other. A handle 140 is secured to walls 132 and138 as well as the corner defined by walls 132, 138. Handle 140 includesa central aperture 142 which allows multiple jars 26 to be stacked oneon top of another with the handles 140 to be aligned with and positionedinside one another. Central aperture 142 may be vertically oriented andextend all the way through the handle 140. In contrast, prior art jarshave required that the handles be alternated when stacking the jars toavoid the handles impeding one another. Alternating handle positionsrequires, of course, more space for storage purposes. In the presentinvention, the nesting of jars 26 will now accommodate all of thehandles 140 aligned vertically relative to one another.

Another novel aspect of the present jar 26 according to the presentinvention relates to an additional fifth or truncated wall 135 which ispositioned opposite handle 140. Walls 132, 134, 136, 138 may be arrangedin a generally rectangular, tapered shape. Wall 135 truncates, inessence, the typical corner that would otherwise be formed between wall132 and 138. As shown in FIG. 11, walls 132, 134, 146, 138 define aperimeter around the blade 28 where wall 135 is much closer to thecentral axis 144 of blade 28 as compared to the corners formed by walls132, 134, 136, 138. In one embodiment, wall 135 is approximately 2.4inches from the central pivot axis 144 of blade 28 (at the height of theblade). In contrast, corners formed by walls 132, 134, 136, 138 areapproximately 3.5 inches from the central axis 144. Accordingly, thevortex created when blending liquid inside of container or jar 26 movesaway or shifts from the central axis 144 of blade 28. The approximatecenter of the vortex created by the configuration of jar 26 will besomewhere between pivot axis 144 and wall 135. When blending a liquidinside of jar 26, liquid will climb up on the corner of the jar formedby walls 134 and 136, and will be lower toward wall 135. This type offlow reduces cavitation and increases the speed and efficiency withwhich beverages, such as smoothies, can be made.

FIGS. 11 and 12 show the construction and mounting of blade 28 inside ofjar 26. A splined shaft 150 is received by the splined shaft receptacle92 extending from motor 80 (FIG. 8). This removable connection willallow the blade 28 to rotate upon actuation of the motor 80. A bearingassembly 152 allows free rotation of the splined shaft 150 and attachedblade 28. Blade 28 includes blade tips or winglets 154 which extendupwardly substantially parallel to the walls 132-136 of the jar 26. Theoverall length of the blade 28 is approximately between the range of 4.5and 4.75 inches. The blade extends outwardly from its attached pivotlocation 144 in a perpendicular manner. The blade is twisted, however,toward the blade tips 154. Still further, the leading edges 155 of bladetips 154 as well as inclined leading edges 157 of blade 28 are taperedto improve blending efficiency. The entire blade assembly is mountedwithin a central aperture formed in a bottom wall 156 which forms thefloor of the jar 26 for holding contents inside of the jar 26.

The unique blade 28 is relatively large, compared to prior art blades.The single blade construction, as compared to traditional cross-bladeconstruction, allows all types of ingredients, such as IQF fruit, tofall between the ends of blade 28 as it rotates to produce a desired,smooth, and consistent texture of beverage.

The jar further includes lower cavities 158 which correspond in size toupstanding guide walls 36 (FIG. 2) formed on housing 24 for rapid andefficient mounting of the jar 26 on top of housing 24.

FIGS. 14-15 show the lid 30 utilized as a cover for the jar 26 of theblending apparatus 20. The lid 30 is made of a moldable formable rubbermaterial. The lid snaps into the top of jar 26 (FIG. 10) to seal the jarand prevent the user's hands from being inserted into the opening 130 ofjar 26 during processing.

The lid 30 more specifically comprises a top surface 160 and a channel162 which surrounds top surface 160. The channel 162 defines, on theopposite side, a four-wall extension 164 which seats inside of opening130 upon installation of the lid 30 onto jar 26. A plurality of tabs 166extend outwardly from each corner of the lid 30 to provide an easylocation for grasping the lid and removing the lid after completion of ablending cycle. A plurality of downwardly extending jar retaining walls170 extend between tabs 166 so that the lid 30, when installed over jar26, is retained in its desired location.

Another novel aspect of the present invention is that becausearticulation of the cover 24 relative to stationary base 22 is requiredto actuate the blending device 20, downward pressure on top surface 160of lid 30 is generally required. Such downward pressure will urge thedownwardly extending walls 164 of the lid 30 toward the inside surfacesof jar opening 130 to seal the lid 30 tightly against jar 26 and preventliquids from escaping during the blending process. In addition, becausedownward pressure on lid 30 is required, as a general matter, toarticulate the housing 24 relative to stationary base 22, the likelihoodof the operator of the blending apparatus 20 inserting his or her handinto opening 130 during the blending process is greatly reduced.

While this invention has been described with reference to certainspecific embodiments and examples, it will be recognized by thoseskilled in the art that many variations are possible without departingfrom the scope and spirit of this invention. The invention, as describedby the claims, is intended to cover all changes and modifications of theinvention which do not depart from the spirit of the invention. Thewords “including” and “having,” as used in the specification, includingthe claims, shall have the same meaning as the word “comprising.”

1. A blending container comprising: a mixing blade which rotates on anaxis; a bottom positioned below the mixing blade; and a first wall, asecond wall, a third wall, and a fourth wall each of which extendsupward from the bottom and is planar; wherein the first wall faces thethird wall and the second wall faces the fourth wall; wherein an areawhere the second wall meets the third wall forms an at leastsubstantially right angle, and an area where the third wall meets thefourth wall forms an at least substantially right angle; and wherein anarea where the first wall meets the fourth wall is positioned closer tothe axis than the area where the second wall meets the third wall. 2.The blending container of claim 1 wherein an area where the first wallmeets the second wall forms an at least substantially right angle. 3.The blending container of claim 1 comprising a handle positionedadjacent to the area where the first wall meets the fourth wall.
 4. Theblending container of claim 1 comprising a handle having a verticallyoriented aperture that extends through the handle.
 5. The blendingcontainer of claim 1 wherein the area where the first wall meets thefourth wall is planar.
 6. A blending container comprising: a mixingblade which rotates on an axis; a bottom positioned below the mixingblade; a first wall, a second wall, a third wall, and a fourth wall eachof which extends upward from the bottom and is planar; and means formoving the vortex created when liquid is blended inside the blendingcontainer away from being over the axis; wherein the first wall facesthe third wall and the second wall faces the fourth wall; and whereinthe second wall meets the third wall at a corner that extendssubstantially straight up a side of the blending container.
 7. Theblending container of claim 6 wherein the means for moving the vortexextends upward from the bottom and is positioned between the first walland the fourth wall.
 8. A stack of blending containers comprising two ofthe blending containers recited in claim 6 wherein each of the blendingcontainers further comprises a handle and wherein the two blendingcontainers are stacked one inside the other so that the first wall, thesecond wall, the third wall, and the fourth wall from one blendingcontainer are positioned adjacent to the first wall, the second wall,the third wall, and the fourth wall, respectively, of the other blendingcontainer and so that the handle from the one blending container ispositioned at least in part in the handle of the other blendingcontainer.
 9. The blending container of claim 6 wherein the corner wherethe second wall meets the third wall is a second corner, and wherein thefirst wall meets the second wall at a first corner and the third wallmeets the fourth wall at a third corner, wherein the first corner andthe third corner extend straight up the side of the blending container.10. The blending container of claim 6 wherein the corner where thesecond wall meets the third wall is a second corner, and wherein thefirst wall meets the second wall at a first corner and the third wallmeets the fourth wall at a third corner, wherein the means for movingthe vortex is positioned between the first wall and the fourth wall. 11.The blending container of claim 10 wherein each of the first corner, thesecond corner, and the third corner form an at least substantially rightangle.
 12. The blending container of claim 10 wherein the axis ispositioned closer to the means for moving the vortex than to the firstcorner, the second corner, or the third corner.
 13. The blendingcontainer of claim 6 wherein the first wall, the second wall, the thirdwall, and the fourth wall define an opening that has a generallyrectangular shape.
 14. The blending container of claim 1 wherein thefirst wall, the second wall, the third wall, and the fourth wall definean opening that has a generally rectangular shape.
 15. The blendingcontainer of claim 1 wherein the area where the second wall meets thethird wall forms a corner that extends straight up a side of theblending container.
 16. The blending container of claim 1 wherein thearea where the first wall meets the fourth wall moves the vortex createdwhen liquid is blended inside the container away from being over theaxis.
 17. The blending container of claim 2 wherein the axis ispositioned to the area where the first wall meets the fourth wall thanto the area where the first wall meets the second wall, the area wherethe second wall meets the third wall, or the area where the third wallmeets the fourth wall.